Nuno Rodrigo Madeira

Greenhouse melon cultivation in the Brazilian Midwest sits at the intersection of climate daptation, low-carbon agriculture, and food justice, especially for vegetable family farming, which produces about 67% of national vegetables despite occupying only 23% of agricultural land and facing high climate vulnerability. This study evaluated soil organic carbon (SOC) and its physical fractions under conventional tillage (CT), minimum tillage (MT), and No-Till Vegetable Systems (NTVS) during two greenhouse melon crop cycles in a very clayey dystrophic Rhodic Ferralsol in Brasília, Brazil. The experiment followed a randomized block design with six replicates, two soil depths (0-10 and 10-30 cm), four repeated samplings, and physical fractionation into particulate organic carbon (POC) and mineral-associated organic carbon (MAOC). Significant management × time interactions were detected for POC, MAOC, and SOC mainly in the 0-10 cm layer. POC was the most dynamic fraction, with sharper short-term fluctuations and greater losses under CT, while NTVS and MT generally provided better conditions for carbon retention. MAOC was more stable, but in the second cycle at 0-10 cm it showed a strong positive correlation with SOC (r = 0.970; P = 0.030), suggesting closer tracking of total carbon dynamics in that phase and a possible faster SOC dynamic in Greenhouse cultivation. These results indicate that greenhouse melon under NTVS and MT can align edaphic regeneration, climate adaptation, and just transition goals in Brazilian vegetable family farming.

The conventional vegetable production system (CVPS) is characterised by intensive soil disturbance, which requires significant energy input and disrupts the soil-plant equilibrium, primarily throug...

The quality and preparation of arracacha propagules are key factors affecting root yield; however, studies on this approach remains limited. This study aimed to evaluate the effects of propagule size and cutting on the yield of the cultivar Amarela de Senador Amaral and to compare its productive performance with that of other cultivars. Experiments were conducted in Canoinhas, Santa Catarina, using a randomized complete block design with seven replications and plots consisting of five plants. In the first experiment, three propagule sizes (large, medium, and small) were evaluated. In the second, medium-sized propagules were subjected to two treatments: bevel cutting and no cutting. In the third, the cultivar Amarela de Senador Amaral was compared with the cultivars BRS Rubia 41, BRS Catarina 64, and BRS Acarijó 56. The number of commercial roots, root mass, and average commercial root mass were assessed. It was observed that cutting the propagules increased the number of commercial roots and overall yield, although it reduced average root mass. Large and small propagules resulted in higher yields than medium-sized propagules. The cultivar BRS Acarijó 56 showed superior productivity and greater average commercial root mass compared with the other cultivars evaluated.

As plantas alimentícias não convencionais (PANC) são plantas espontâneas ou cultivadas, capazes de ampliar as fontes de nutrientes disponíveis à população e promover a soberania e segurança alimentar. Apesar do potencial que as PANC representam, as espécies nativas do Brasil, em sua maioria, não fazem parte do grupo de alimentos mais consumidos no país. O objetivo do trabalho foi analisar o estado da arte das pesquisas acadêmicas relacionadas às PANC, utilizando uma análise bibliométrica de pesquisa e produção científica mundial a respeito do tema. Foram identificados 2.056 artigos provenientes de pesquisa, com 50 termos de busca, sendo que, desses, 26 retornaram resultados. Foi observado um aumento em publicações sobre o tema, em especial a partir de 1996. A fonte mais relevante sobre o tema é o Journal of Ethnobiology and Ethnomedicine. Os Estados Unidos ocupam o primeiro lugar em relação ao número de citações sobre a temática, e o Brasil ocupa a 28ª colocação. Palavras como wild, edible, plant, flowers, food, traditional, indigenous e plants foram as mais citadas em títulos dos artigos. Apesar do aumento das pesquisas acerca do tema, o cenário ainda é incipiente, considerando a grande quantidade de plantas compreendidas como “não convencionais” existentes.

Food insecurity has increased over time, combined with contamination, environmental degradation, and declining human health. This shows that conventional forms of agriculture are neither sustainable nor viable, whether from an ecological or social perspective. The objective of the study was to present the state of the art on the use of Non-Conventional Food Plants - Panc, in agroecological systems and their relationship with the strengthening of food and nutrition sovereignty and security. For this, a narrative bibliographic review was carried out, with data collected on SciELO platforms, CAPES and Web of Science journals. In addition to the Google Scholar® website, academic works (dissertations and theses) and FAO (Food and Agriculture Organization of the United Nations) reports. It was found that agroecology, seen as a science, and able to support a transition to sustainable agriculture models, has contributed to sustainable rural development. One of the objectives of agroecology is the search for the increasing use of a greater diversity of plants that, in addition to the food purpose, represent a subsistence alternative for rural communities and that also can contribute to the region's economy, such as Non-Food Plants. Conventional – Panc. The study also reinforces that the production of Panc in agroecological-based systems contributes to food security. They are sustainable systems concerned with the environment and nutrition, ensuring the distribution of affordable and nutritious food, and managing natural resources to preserve ecosystems.

New ways of use, consumption and derived products or technologies makes the species of this family increasingly present in our daily lives. As an example, the small Arabidopsis thaliana plant is today one of the main tools of molecular biology (^{The Arabidopsis Genome Iniative, 2000}), just as Fast Plants® are becoming important educational and research tools (^{Fast Plants, 2019}), in addition to vegetables that play an important role due to the high concentration of phytochemicals that show several epidemiological benefits, preventing the human body against reactive oxygen species damages and decelerated the progress of many chronic diseases (^{Idrees et al., 2019}).

Mechanizing the harvest of Jalapeño pepper involves changes in the production system. Spacings between plants in rows (10 to 40 cm; 60 cm fixed between rows) were evaluated in relation to plant architecture, productivity and fruit quality of cultivar BRS Sarakura during three years, in a randomized complete block design with five replicates. Productivity (41.9 to 78.8 t ha^-1) and plant height (40.1 to 47.3 cm) responded linearly to density; on the other hand, productivity per plant responded negatively (0.48 to 1.04 kg plant^-1). The stem first bifurcation height was little influenced. Fruit chemical analyses were carried out in the second year of the experiment; spacing significantly influenced pH (5.36 to 4.84), total titratable acidity (TTA) (0.48 to 0.36%) and total soluble solids (TSS)/TTA ratio (11.5 to 15.6); no influence on TSS (5.65%) was noticed, though. The increase of plant population provided an increase in productivity without affecting fruit quality; the highest height of the first bifurcation achieved may not be enough to enable mechanized harvesting of the cultivar BRS Sarakura.

Desempenho de cultivares de batata-doce para rendimento e qualidade de raízes em Sergipe - DOI:10.5039/agraria.v14i1a5628

More than 90% of the planted area in Brazil is occupied with a cultivar named Amarela de Senador Amaral. The success of this cultivar is due, among other factors, to its high productivity and precocity, leading to the almost total replacement of other cultivars such as the ancient cultivar named Amarela Comum (^{Embrapa Hortaliças, 2015}).

The need to adapt agricultural crops to climate change and to develop more sustainable cultivation systems has been a major challenge for agriculture. In this study the effects of soil conservation practices were evaluated on production aspects of melon (Cucumis melo), cultivar BRS Araguaia, cultivated in a greenhouse under soil and climatic conditions of the Brazilian Cerrado. The adopted experimental design was of randomized blocks with three treatments (soil managements) and six replicates. We evaluated the following soil management systems: no-tillage (PD), minimum tillage (CM) and conventional tillage (PC) in two cycles. Increases in commercial productivity and average number of marketable fruits were observed for PD (61.5 and 61.2 t/ha; 56,000 and 44,300 fruits/ha in the first and second cycles, respectively) and CM (59.7 and 57.5 t/ha; 55,700 and 42,400 fruits/ha in the first and second cycles, respectively). No effects of management systems on fruit quality were observed. PD and CM were effective in increasing the melon production under evaluated conditions.